JP2017082702A - On-vehicle electronic controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To store deterioration information of components at the time point when deterioration of the components for a vehicle progresses to some extent.SOLUTION: An on-vehicle electronic controller 1 of this invention has a function of diagnosing failure of components mounted on a vehicle, and a function of detecting degree of deterioration of the components, and includes: a deterioration information storage unit 5 configured to store deterioration information of the components; a determination unit 12 configured to determine whether the degree of deterioration reaches a determination value for each components; and a recording unit 13 configured to write the deterioration information of the components into the deterioration information storage unit 5 when the degree of deterioration of the components reaches the determination value.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an on-vehicle electronic control device that is mounted on a vehicle and stores data and the like that are useful for analyzing the cause of failure of a vehicle component.

  Conventionally, in-vehicle electronic control devices for automobiles incorporate a diagnosis function, that is, a function for self-diagnosis whether an abnormality or a failure has occurred in a vehicle based on a detection signal detected by a sensor. Yes. An example of a device that stores analysis data useful for analyzing the cause of an abnormality or failure occurring in a vehicle is described in Patent Document 1.

JP 2013-181512 A

  In the case of the above conventional configuration, the analysis data is stored when a failure occurs in the vehicle. Therefore, when analyzing the failure, only the analysis data at the time of the failure occurrence can be used. On the other hand, in order to analyze the cause of the deterioration of a part for a vehicle in recent years, in order to analyze why the failure of the part has occurred since the vehicle began to be used. For example, there is a demand for data for analysis of deterioration (that is, deterioration information) at the time when the deterioration of parts has progressed to some extent.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an in-vehicle electronic control device capable of storing component deterioration information at the time when deterioration of a vehicle component has progressed to some extent.

  The invention of claim 1 is an on-vehicle electronic control device (1) having a function of performing a fault diagnosis of a component mounted on a vehicle and a function of detecting a degree of deterioration of the component, wherein the deterioration information of the component is obtained. A deterioration information storage unit (5) for storing, a determination unit (12) for determining whether or not the degree of deterioration has reached a determination value for each component, and when the degree of deterioration of the component has reached the determination value And a recording unit (13) for writing deterioration information of the component into the deterioration information storage unit (5).

The block diagram of schematic structure of engine ECU which shows 1st Embodiment of this invention. Diagram showing deterioration characteristics of parts The figure explaining the order which memorizes degradation analysis data Flow chart of control for determining failure deterioration of parts Flow chart of control for selecting parts for storing deterioration information Flow chart of control for storing deterioration information for each part Flow chart of control for storing deterioration information for each data Flow chart of control for determining failure deterioration of battery Flow chart of control for determining failure deterioration of injector Flow chart of control to delete deterioration information Flow chart of repair work using vehicle diagnostic device

  Hereinafter, a first embodiment in which the present invention is applied to an engine ECU (Electronic Control Unit) will be described with reference to FIGS. 1 to 11. The engine ECU 1 of this embodiment includes a control unit 2 made of, for example, a microcomputer, a communication interface 3, an input / output device 4, and a nonvolatile memory 5. The input / output device 4 is connected to various sensors 6 (for example, an oxygen sensor) and various actuators 7 (for example, an injector). A vehicle diagnosis device 9 (for example, a failure diagnosis tester) is connected to the communication interface 3 via a connector 8.

  The control unit 2 includes a two-way communication unit 10, a deterioration progress calculation unit 11, a deterioration information storage component selection unit 12, and a component-specific deterioration information recording unit 13. The bidirectional communication unit 10 has a function of transmitting / receiving a signal to / from the vehicle diagnostic device 9 via the communication interface 3. The deterioration progress calculation unit 11 receives signals from various sensors 6 and various actuators 7 via the input / output device 4, and based on these signals, deterioration of various parts (for example, an injector, a catalyst, etc.) for the vehicle. It has a function of calculating the degree of progress (hereinafter referred to as the degree of deterioration) separately. In this case, for example, changes in the degree of deterioration of the three parts A, B, and C are shown in FIG. The vertical axis in FIG. 2 indicates the degree of deterioration, and the horizontal axis indicates time (year) or travel distance (10,000 km). In FIG. 2, the solid line P1 indicates the degree of deterioration of the part A, the solid line P2 indicates the degree of deterioration of the part B, and the broken line P3 indicates the degree of deterioration of the part C. Although the solid lines P1, P2, and P3 are shown to be linear (that is, straight lines), they are actually non-linear.

  The deterioration information storage component selection unit 12 determines whether or not the deterioration degree of each component has reached a predetermined deterioration recording determination value r1 (hereinafter referred to as a determination value r1). select. The deterioration information storage component selection unit 12 has a function as a determination unit. The determination value r1 is a deterioration level determination level for storing deterioration analysis data. As shown in FIG. 2, the same determination value r1 is used for the three components A, B, and C, but a different determination value r1 may be set for each component. In FIG. 2, a reference value r2 is a failure determination value for determining whether or not a component has failed.

  The component-specific degradation information recording unit 13 has a function as a recording unit that records degradation information for each component. Specifically, the component A degradation information recording unit 14, the component B degradation information recording unit 15, , A component C deterioration information recording unit 16, and so on. In this case, the deterioration information recording unit 14, 15, 16,... Corresponding to the component selected by the deterioration information storage component selecting unit 12 stores the deterioration information of the component, that is, the deterioration analysis data in the nonvolatile memory 5. It is configured to be stored in the set deterioration information storage area. For example, in the case of the present embodiment, the deterioration level of the part A first reaches the determination value r1, so that the deterioration analysis data of the part C is first stored in the nonvolatile memory 5 as shown in FIG. Thereafter, since the degree of deterioration of the part B reaches the determination value r <b> 1, the deterioration analysis data of the part B is stored in the nonvolatile memory 5. Thereafter, the deterioration degree of the part C reaches the determination value r1, and therefore the deterioration analysis data of the part A is stored in the nonvolatile memory 5. In this case, the nonvolatile memory 5 has a function as a deterioration information storage unit.

  Further, the storage capacity of the nonvolatile memory 5 is configured to be larger than that of the maximum capacity in the deterioration information of a plurality of components mounted on the vehicle. In addition, the capacity | capacitance of the deterioration information of components is preset for every component. The non-volatile memory 5 is composed of, for example, a flash memory, an EEPROM, an SD card memory, or the like.

  Next, the operation of the above configuration will be described with reference to FIGS. 4 to 10 show the contents of a plurality of controls of the control unit 2, and these controls are executed in parallel and repeatedly at every set time. The flowchart of FIG. 11 shows the contents of repair work using the vehicle diagnostic apparatus 9.

  First, the flowchart of FIG. 4 shows the content of control for detecting deterioration failure of a catalyst that is a vehicle component (ie, control of the component A deterioration information recording unit 14 if the component A is a catalyst, for example). Show. In step S10 of FIG. 4, acquisition of data necessary to calculate, for example, “delay time” as a failure determination index (that is, a deterioration determination parameter) as to whether or not the catalyst failure diagnosis execution condition is satisfied. Determine if completed. In this case, the “delay time” is from the time point t1 when the front oxygen sensor provided at the front part of the catalyst changes from rich to lean, and when the rear oxygen sensor provided at the rear part of the catalyst changes from rich to lean. Since it is the time difference up to t2, it is only necessary to determine whether or not each measurement at time t1 and time t2 is completed as the necessary data. The shorter the “delay time”, the higher the degree of deterioration calculated from the “delay time”. Degree of degradation and its determination value r1 use a rate that does not depend on the failure determination index of each component, that is, a unified value (for example, a percentage), for example, 0 when new and 100 when failure is confirmed (ie, r2). Is desirable. For this reason, it is preferable to determine the deterioration degree by converting the deterioration determination parameter into the aforementioned unified rate (for example, percentage). For example, when a percentage is used, the determination value r1 is preferably set such that, for example, a uniform 10% deterioration has progressed.

  If the failure diagnosis execution condition is satisfied in step S10, the process proceeds to step S20, where, for example, a “delay time”, that is, a time difference from time t1 to time t2 is calculated as a failure determination index. Next, the process proceeds to step S30, and it is determined whether or not the “delay time” is less than the set catalyst failure determination time (that is, the delay time corresponding to the failure determination value r2). Here, when the “delay time” is equal to or greater than the failure determination time for the catalyst (that is, the degree of deterioration of the catalyst is less than the failure determination value r2), the process proceeds to step S40, and a predetermined normality determination process is executed.

  Subsequently, the process proceeds to step S50, in which it is determined whether or not the “delay time” has become equal to or greater than a determination value r1, which is a determination level of the degree of deterioration for storing deterioration analysis data. In this case, since the “delay time” is time, the “delay time” is converted into the unified rate, that is, the deterioration level, and the converted deterioration level is compared with the deterioration recording determination value r1. If the deterioration degree of the catalyst calculated from the “delay time” is less than the determination value r1 in step S50, the process proceeds to “NO”, and this control is terminated without doing anything.

  In step S50, when the degree of deterioration of the catalyst is equal to or greater than the determination value r1, the process proceeds to step S70 to call control for selecting the deterioration information storage component. Specifically, the catalyst is set as the component X, and FIG. 5 is executed. Then, when the execution of the control of FIG. 5 (that is, the control for selecting the deterioration information storage component) is completed, this control is terminated.

  If the “delay time” is less than the catalyst failure determination time in step S30, the process proceeds to step S60, and a predetermined failure confirmation process is executed. In this case, the failure code of the catalyst failure is stored, the processing for notifying the user of the catalyst failure, the processing for recording failure analysis data, and the like are executed, and this control is finished.

  Next, the control for selecting the deterioration information storage component will be described with reference to FIG. In step S110 of FIG. 5, it is determined whether or not the part X is a deterioration information storage target part. Here, if the part X is not the deterioration information storage target part, the process proceeds to “NO”, and the present control is terminated without doing anything.

  In this case, since the part X is a catalyst and is a deterioration information storage target part, the process proceeds to step S120, and the size of the deterioration part, that is, the deterioration information (that is, deterioration analysis data) of the catalyst set by the caller. Get information. Subsequently, the process proceeds to step S130, whether or not there is an empty space in the deterioration information storage area of the nonvolatile memory 5, that is, whether or not the size of the empty area in the deterioration information storage area is larger than the size of the deterioration information of the catalyst. to decide. The deterioration information storage area is secured as a storage area having a preset size in the nonvolatile memory 5. Here, when there is no empty space in the deterioration information storage area, the process proceeds to “NO”, and nothing is done, and this control is terminated.

  If the deterioration information storage area is empty in step S130, the process proceeds to step S140, and the control for storing the deterioration information of the deteriorated part (that is, the catalyst) is activated. In this case, as the processing content of S140, the determination flag in S210 may be set so that YES is determined as a component for storing deterioration information in the determination processing in 210 of FIG. The control in FIG. 6 is executed in parallel with the control in FIG. 5. When the determination flag is set, the control in FIG. 6 is executed.

  When the execution of the process of step S140 is completed, the process proceeds to step S150, where the size (that is, capacity) of the free area of the deterioration information storage area is calculated, and the calculation result is stored in a memory (for example, RAM) in the engine ECU 1 Etc.). Thereby, this control is complete | finished.

  Next, control for storing deterioration information of deteriorated parts will be described with reference to FIGS. In step S210 of FIG. 6, it is determined whether or not the part X is a deterioration information storage target part. Specifically, the determination can be made based on whether or not the determination flag set in step S140 in FIG. 5 is set. Here, if the part X is not a deterioration information storage target part, the process proceeds to “NO” and this control is terminated. In step S210, when the part X is a deterioration information storage target part, the process proceeds to step S220.

  In this step S220, update data for each diagnosis determination for deterioration analysis is acquired, and the acquired data is stored in a memory in the engine ECU 1. The update data for each diagnosis determination is data calculated from a value when a specific condition is established, such as at the time of failure diagnosis. For example, the diagnosis determination value data for N times from the worst and data (engine) Data such as rotation speed, engine coolant temperature, accelerator opening, vehicle speed, acceleration, etc.) are appropriately calculated and acquired.

  Here, the processing for each data to acquire data is executed by calling the control of FIG. In step S282 in FIG. 7, calculation of data to be recorded (for example, data such as resolution and unit system) is executed. In this case, data (for example, parameters) used in normal control is acquired, and data to be recorded is calculated based on the acquired data. For example, vehicle speed data is acquired, and based on the vehicle speed data. Acceleration (that is, data to be recorded) is calculated.

  Subsequently, the process proceeds to step S284, and it is determined whether or not the data to be written has been determined, that is, whether or not the data to be written to the deterioration failure analysis data storage memory provided in the memory in the engine ECU 1 has been determined. If the data to be written is not confirmed, the process proceeds to “NO”, the control is terminated, and the control is repeatedly executed until the calculation of all the data to be recorded is completed (that is, the data is confirmed). Note that the data decision timing differs depending on the type of data.

  In step S284, when the data to be written is confirmed (that is, calculation of all data to be recorded is completed), the process proceeds to step S286, and the data to be written as deterioration information or failure information is stored in the deterioration failure analysis data storage memory. Write. Here, the deterioration failure analysis data storage memory is a memory provided in the engine ECU 1, and is a memory (for example, a RAM, an EEPROM, a flash memory, etc.) different from the nonvolatile memory 5. Further, the data to be written in the deterioration failure analysis data storage memory is only data scheduled to be output to the vehicle diagnosis apparatus 9 as deterioration information, and does not include halfway data. As a result, it is possible to prevent writing (that is, reading) a value during calculation as deterioration information.

  For each data to be recorded, “How to calculate it”, “When will it be effective as deterioration information while continuing to update regularly”, “Vehicle maintenance / It is configured to select useful data from the viewpoints of whether it is effective for repair and whether it has reached the quality initially specified by the component designer and writes it to the “deterioration failure analysis data storage memory”.

  Next, the process proceeds to step S230 of FIG. 6, the update data for each key-off for deterioration analysis is acquired, and the acquired data is stored in the memory in the engine ECU 1. In the case of this processing as well, as in the case of step S220 described above, the control of FIG. 7 is appropriately called and repeatedly executed. The update data for each key-off is data measured in units of engine operation (ie, from key-on to key-off) (ie, cycle). For example, the engine operation time from the start to the end of the cycle, Data such as the travel distance and the number of idle stops (that is, engine stop) is appropriately calculated and acquired. The key-off updated data is used as data for grasping, for example, the usage form of the vehicle.

  And it progresses to step S240, the consumption data for deterioration analysis are acquired, and the acquired data are memorize | stored in the memory in engine ECU1. In the case of this processing as well, in the same manner as in the case of steps S220 and S230 described above, the control in FIG. 7 is appropriately called and repeatedly executed. The above-mentioned consumption data is data recorded according to the digestion rate (that is, the ratio) with respect to the denominator of the parts guarantee. For example, when the failure assumption is N times of injection (ie, driving) as the guaranteed number of injectors In addition, at each time point when 1% of N is digested (that is, N / 100 times of injection), data of the deterioration degree of the injector is calculated and acquired. The degree of deterioration of the injector is a rate (ie, a numerical value) when the valve opening time of a new injector is 0 and the valve opening time of a deteriorated injector is 100.

  Thereafter, the process proceeds to step S250, and it is determined whether or not the update of the deterioration information is completed, that is, whether or not the condition for writing the deterioration information in the nonvolatile memory 5 is reached. In this case, when the write condition is reached, for example, when the failure of the component is confirmed, when the degradation level of the component reaches the determination value r1 shown in FIG. 2, or when the degradation level of the component is as shown in FIG. Or when the definite storage level r3 shown in FIG. The fixed storage level r3 is a value that is appropriately set to a level between the determination reference value r1 and the failure determination value r2. In addition to the above-mentioned deterioration level, when the set number of years has been reached with respect to the service life of the part (that is, the set ratio with respect to the service life), or the standard set with respect to the part warranty standard (i.e. It is preferable that the writing condition is also included when the set ratio with respect to the guarantee standard) is reached. Further, it is preferable that the condition for writing the deterioration information of these parts is set for each part.

  In step S250, when the condition for writing the deterioration information to the nonvolatile memory 5 is reached, the process proceeds to step S260, and the deterioration information (that is, deterioration analysis data) of the component or the failure information of the component is written to the nonvolatile memory 5. In this case, as shown in FIG. 3, the component deterioration information and the like are written in the nonvolatile memory 5 in the order in which the component deterioration level first reaches the determination value r1. Thereby, this control is complete | finished. In step S250, when the condition for writing the deterioration information to the nonvolatile memory 5 has not been reached, the process proceeds to “NO” and this control is terminated.

  Next, the flowchart of FIG. 8 shows the content of the control which detects the deterioration failure of the battery which is components for vehicles, for example. In step S310 of FIG. 8, it is necessary to calculate whether or not the battery failure diagnosis execution condition is satisfied, that is, for example, “voltage difference before and after engine start” as a failure determination index (ie, deterioration determination parameter). Determine whether data acquisition is complete. In this case, since the voltage difference is a voltage difference between the battery voltage V1 before starting the engine and the battery voltage V2 after starting the engine, the measurement of the voltage V1 and the voltage V2 is completed as the necessary data. Or not.

  If the failure diagnosis execution condition is satisfied in step S310, the process proceeds to step S320, where, for example, a “voltage difference before and after engine start”, that is, a voltage difference between the voltage V1 and the voltage V2 is calculated as a failure determination index. Next, the process proceeds to step S330, and it is determined whether or not the “voltage difference before and after engine start” is equal to or greater than the set battery failure determination voltage difference (that is, a voltage difference corresponding to the determination value r2). Here, when the “voltage difference before and after engine start” is less than the failure determination voltage difference for the battery, the process proceeds to step S340, and a predetermined normality determination process is executed.

  Subsequently, the process proceeds to step S350, where the degree of deterioration of the battery is calculated from the “voltage difference before and after engine start”, and the calculated degree of deterioration is equal to or greater than a determination value r1 that is a determination level of the degree of deterioration for storing deterioration analysis data. It is determined whether or not. Here, if the degree of deterioration of the battery is less than the determination value r1, the process proceeds to “NO” in step S350, and this control is terminated without doing anything.

  In step S350, when the degree of deterioration of the battery is equal to or greater than the determination value r1, the process proceeds to step S370, and control for selecting a part storing deterioration information shown in FIG. 6 is called. In this case, a battery is set as the part X. Thus, the program configured by the flowchart of FIG. 6 for storing the battery deterioration information is started.

  If the “voltage difference before and after engine start” is greater than or equal to the battery failure determination voltage difference in step S330, the process proceeds to step S360, and a predetermined failure confirmation process is executed. In this case, the failure code of the battery failure is stored, the idle stop control is prohibited, the processing for notifying the user of the battery failure, the processing for recording the failure analysis data, and the like are executed, and this control is terminated.

  Next, the flowchart of FIG. 9 shows the content of the control which detects the deterioration failure of the injector which is components for vehicles, for example. In step S410 of FIG. 9, whether or not an injector failure diagnosis execution condition is satisfied, that is, for example, “failure indicator (that is, deterioration determination parameter)” is confirmed, for example, “the injector is opened after the start of energization. It is determined whether or not acquisition of data necessary to calculate “time until” is completed. In this case, since the confirmation time is the time from the time point t3 when the injector starts energization to the time point t4 when the injector valve opening is confirmed, each measurement at the time point t3 and the time point t4 is completed as the necessary data. What is necessary is just to judge whether it did.

  If the failure diagnosis execution condition is satisfied in step S410, the process proceeds to step S420, and as a failure determination index, for example, “time from the start of energization to the injector until the injector is opened”, that is, from time t3 to time t4. Calculate the time until. Next, the process proceeds to step S430, and a correction amount for the injector energization control of the injector is calculated. In this case, when the control for actually energizing the injector is executed, a correction amount necessary for correcting (for example, earlier) the energization start timing by the amount of deterioration of the injector is calculated.

  Subsequently, the process proceeds to step S440, where the degree of deterioration of the injector is calculated from “the time from when the injector is energized to when the valve opening of the injector is confirmed, that is, the time required for opening the valve”. It is determined whether or not a determination value r1 that is a determination level of the degree of deterioration for storing analysis data has been reached. Here, if the degree of deterioration of the injector is less than the determination value r1, the process proceeds to “NO” in step S440, and this control is terminated without doing anything.

  In step S440, when the deterioration level of the injector is equal to or greater than the determination value r1, the process proceeds to step S450, and control for selecting the deterioration information storage component shown in FIG. 6 is called. In this case, an injector is set as the part X, and the control shown in FIG. 6 is executed. Then, when the activation process of the control shown in FIG. 6 (that is, the control for selecting the deterioration information storage component) is completed, this control is terminated.

  Next, the flowchart of FIG. 11 shows the procedure and operation contents when the vehicle diagnosis device 9 is connected to the vehicle diagnosis connector 8 to perform vehicle inspection or vehicle failure repair. In step S510 of FIG. 11, diagnostic communication with the engine ECU 1 is made possible by connecting the vehicle diagnostic device 9 (failure diagnostic tester) to the diagnostic connector 8 of the vehicle. Then, it progresses to step S520 and the vehicle diagnostic apparatus 9 acquires well-known diagnostic information (For example, failure code, freeze frame data, failure analysis data, etc.) from engine ECU1. The diagnostic information may be stored in the nonvolatile memory 5 or in a memory in the engine ECU 1.

  Then, the process proceeds to step S530, where the vehicle diagnosis apparatus 9 acquires deterioration information of parts from the engine ECU 1, that is, deterioration analysis data for each part stored in the deterioration information storage area in the nonvolatile memory 5.

  Next, the process proceeds to step S540, and the repair worker (a worker who replaces the part) determines whether there is a faulty part based on the diagnostic information acquired in step S520, that is, whether repair work such as part replacement is performed. . Here, if there is a faulty part, the process proceeds to step S550, and the repair worker performs repair / replacement work on the faulty part. When there are a plurality of faulty parts, the processes in steps S540 and S550 are repeatedly executed a plurality of times.

  Thereafter, the process proceeds to step S552, and when the repair / replacement work for the failed part is completed, the repair operator operates the vehicle diagnostic device 9 to read out information on the parts repaired / replaced from the vehicle diagnostic device 9 to the engine ECU 1, Check that it has returned to normal. Then, the process proceeds to step S554, and the repair worker operates the vehicle diagnosis device 9 to transmit information on an erasure request for erasing the diagnosis information. The engine ECU 1 erases the diagnostic information based on the received erase request. Note that steps S550 to S554 indicate repair work that has been performed conventionally.

  Subsequently, the process proceeds to step S560, and the vehicle diagnostic apparatus 9 determines whether there is a deteriorated part (that is, a repair-required part) based on the acquired deterioration information. Here, when there is a deteriorated part, the process proceeds to step S570, and the repair operator performs repair / replacement work of the deteriorated part. In this case, whether to repair the part or replace the part is determined based on the deterioration information of the part (that is, deterioration analysis data). For example, considering the possibility that parts will fail before the next statutory inspection and the possibility that deterioration of parts may adversely affect the fuel efficiency of the vehicle, for example, in the same manner as when tires are worn, It is preferable to examine and adjust the repair and replacement of a part, and to repair and replace the part when it is determined to be replaced. When there are a plurality of deteriorated parts, the processes in steps S560 and S570 are repeatedly executed a plurality of times.

  Thereafter, the process proceeds to step S580, and when the repair and replacement work for the parts is completed, the repair worker operates the vehicle diagnostic device 9 to read out information on the parts that have been repaired and replaced from the vehicle diagnostic device 9 to the engine ECU 1. Confirm that it has returned. And it progresses to step S590, and when it can confirm that it has returned to normal, a repair worker operates the vehicle diagnostic apparatus 9, and transmits the information of the deletion request | requirement which erases deterioration information. Thereby, this control is complete | finished.

  Next, the control when the engine ECU 1 receives information on an erasure request for erasing the deterioration information from the vehicle diagnostic device 9 will be described with reference to FIG. FIG. 10 is a flowchart of a program that is executed for all the parts that are subject to calculation of the deterioration level when the engine ECU 1 receives a request for deleting the deterioration information from the vehicle diagnostic apparatus 9. Even when the engine ECU 1 receives a request for deleting diagnostic information from the vehicle diagnostic device 9, when the diagnostic information of the component to be recorded with deterioration information is deleted, the control of FIG. It may be configured to be erased.

  First, in step S610 of FIG. 10, the engine ECU 1 confirms whether or not there is an erasure request for erasing the deterioration information from the diagnostic device 9. Subsequently, the process proceeds to step S620, and the degree of deterioration is calculated (that is, the degree of deterioration calculated from the latest deterioration determination parameter is acquired).

  Then, the process proceeds to step S630, and it is determined whether or not the degree of deterioration of the target component for which the deterioration information is requested has reached the determination value r1 (that is, whether or not the degree of deterioration is equal to or higher than the determination value r1). In step S630, when the degree of deterioration has not reached the determination value r1, since it has been confirmed that the part to be erased has been repaired and replaced, the process proceeds to step S640. In step S640, the engine ECU 1 erases the deterioration information about the repaired and replaced parts in the nonvolatile memory 5. In this case, for example, the component-specific deterioration information recording unit 13 of the control unit 2 of the engine ECU 1 is configured to delete the deterioration information. That is, the component-specific deterioration information recording unit 13 has a function as an erasing unit. By the erasing, the storage area of the nonvolatile memory 5 is initialized (that is, the memory is released), and deterioration information of other components can be written to the erasing area in the nonvolatile memory 5. Further, in step S640, in addition to the above-described erasure, the function (that is, the recording function) of the deterioration information recording unit corresponding to the repaired / replaced part in the part-specific deterioration information recording unit 13 of the control unit 2 of the engine ECU 1. ) Is disabled. Thereby, this control is complete | finished.

  On the other hand, when the degree of deterioration has reached the determination value r1 in step S630, it can be seen that the part to be erased has not been repaired or replaced, or that repair replacement has been incomplete, step S650. Proceed to In this step S650, the engine ECU 1 notifies the fact that the deterioration information about the repaired and replaced parts in the nonvolatile memory 5 is not erased and is not erased. In this case, for example, it is preferable that the engine ECU 1 is configured to transmit the notification information indicating that the deletion is not performed to the vehicle diagnosis device 9 and display the notification information indicating that the deletion is not performed on the display device in the vehicle diagnosis device 9. . Thereby, this control is complete | finished.

  According to the present embodiment having such a configuration, when the degree of deterioration of a component mounted on the vehicle reaches the determination value r1, the deterioration information (that is, deterioration analysis data) of the component is written in the nonvolatile memory 5. It is possible to store the deterioration information of the parts at the time when the deterioration of the parts for the vehicle has progressed to some extent. By reading and analyzing the deterioration information of the parts, the cause of the failure of the parts can be easily and clearly defined. It becomes possible to analyze.

  Further, in the above-described embodiment, the deterioration information of a plurality of parts is configured to be written in the nonvolatile memory 5 in order from the one in which the degree of deterioration of the parts reaches the determination value r1. According to this configuration, even if the storage capacity of the nonvolatile memory 5 is relatively small, the deterioration information can be stored from the deteriorated component. The cause of failure can be analyzed with reference. In the above embodiment, since the storage capacity of the nonvolatile memory 5 is configured to be larger than that of the maximum capacity in the deterioration information of a plurality of parts, at least one or more in the nonvolatile memory 5 It is possible to reliably store the deterioration information of parts.

  Furthermore, in the above embodiment, when the degradation level of the component reaches the determination value r1 and the degradation information of the component is written into the nonvolatile memory 5, the capacity of the degradation information of the component is the storage capacity of the free area of the nonvolatile memory 5. When it is larger than that, the writing is not executed. According to this configuration, when the vacant area of the non-volatile memory 5 is small, it is possible to prevent the occurrence of a situation in which deterioration information of a large-capacity component is stored incompletely in the non-volatile memory 5. The deterioration information of the parts having a capacity smaller than that of the five free areas can be reliably stored in the nonvolatile memory 5.

  Moreover, in the said embodiment, when it received the deletion request | requirement of the deterioration information of components from the vehicle diagnostic apparatus 9, since it comprised so that the deterioration information of the said components in the non-volatile memory 5 might be deleted, it is unnecessary by reading. By erasing the deteriorated information, the free area of the non-volatile memory 5 can be increased, and the number of parts storing the deteriorated information can be increased.

  Further, in the above embodiment, when it is confirmed that the degradation level of the target component of the erasure request has not reached the determination value r1 when the erasure request for the degradation information of the component is received from the vehicle diagnostic device 9, the target component The function of recording the deterioration information (that is, the functions of the deterioration information recording units 14, 15, 16 and the like of each component) is invalidated. According to this configuration, it is possible to reliably prevent the occurrence of a malfunction that records deterioration information of a component whose degree of deterioration has not reached the determination value r1.

  Further, in the above embodiment, when it is confirmed that the degradation level of the target component of the erasure request has reached the determination value r1 when the erasure request for the degradation information of the component is received from the vehicle diagnostic device 9, The deterioration information of the components in the nonvolatile memory 5 is not erased. According to this configuration, when the deteriorated part is not repaired or replaced, it is possible to reliably prevent the deterioration information of the deteriorated part from being erased by mistake.

  Moreover, in the said embodiment, although it comprised so that it might determine whether the deterioration level reached | attained the determination value about all the components which have detected the deterioration level, it is not restricted to this, All the above-mentioned It may be configured to determine whether or not the degree of deterioration has reached a determination value for only some important parts determined in advance. In the case of such a configuration, the designation of the part to be determined whether or not the deterioration level has reached the determination value is performed by connecting the vehicle diagnostic device 9 and operating the vehicle diagnostic device 9 (that is, It is preferable to be configured to be executable (based on communication data from the vehicle diagnostic device 9). For example, by associating an ID (identifier) with a component and operating the vehicle diagnosis device 9 to specify the component ID (that is, transmitting the component ID specification information), the determination target component is specified. It may be configured. It should be noted that it is preferable that a prioritized order is appropriately assigned to select a part for which deterioration information is currently being recorded or a part designated as described above, and the part is selected according to the priority order. In addition, for a component whose degree of deterioration has not reached the determination value, it is possible to instruct recording by operating the vehicle diagnostic device 9 (that is, based on communication data from the vehicle diagnostic device 9). The deterioration information of the component instructed to be recorded may be recorded immediately.

  In the above-described embodiment, the present invention is configured to be applied to, for example, the engine ECU 1, but is not limited thereto, and may be configured to be applied to other in-vehicle electronic control devices.

  In the drawings, 1 is an engine ECU (on-vehicle electronic control device), 2 is a control unit, 5 is a nonvolatile memory (degradation information storage unit), 6 is various sensors, 7 is various actuators, 9 is a vehicle diagnostic device, 11 Is a deterioration progress degree calculation unit, 12 is a deterioration information storage component selection unit (determination unit), and 13 is a component-specific deterioration information recording unit (recording unit, deletion unit).

Claims (8)

An on-vehicle electronic control device (1) having a function of performing a fault diagnosis of a component mounted on a vehicle and a function of detecting a degree of deterioration of the component,
A deterioration information storage unit (5) for storing deterioration information of the component;
A determination unit (12) for determining whether or not the degree of deterioration has reached a determination value for each component;
A recording unit (13) that writes deterioration information of the component in the deterioration information storage unit (5) when the deterioration level of the component reaches the determination value;
A vehicle-mounted electronic control device comprising:   The recording unit (13) is configured to write the deterioration information of the components in the deterioration information storage unit (5) in order from the one in which the degree of deterioration of the components reaches a determination value for the deterioration information of a plurality of components. The on-vehicle electronic control device according to claim 1.   The in-vehicle electronic control device according to claim 1 or 2, wherein the deterioration information storage unit (5) is configured to have a storage capacity larger than that of the maximum capacity in the deterioration information of the plurality of parts.   When the deterioration level of the component reaches a determination value and the deterioration information of the component is written into the deterioration information storage unit (5), the recording unit (13) has a capacity of the deterioration information of the component as the deterioration information. 4. The on-vehicle electronic control device according to claim 3, wherein the on-vehicle electronic control device is configured not to execute writing when it is larger than a storage capacity of an empty area of the storage unit (5).   The erasure unit (13) for erasing the deterioration information of the component in the deterioration information storage unit (5) when a request for erasing the deterioration information of the component is received from the vehicle diagnostic device (9). The vehicle-mounted electronic control apparatus as described in any one of 1-4.   When the erasure unit (13) receives a request for erasing the deterioration information of the part, and confirms that the degree of deterioration of the target part of the erasure request has not reached the determination value, the deterioration of the target part The on-vehicle electronic control device according to claim 5, configured to invalidate a function of recording information.   When the erasure unit (13) receives the erasure request for the deterioration information of the component, and confirms that the degree of deterioration of the target component of the erasure request has reached a determination value, the deterioration information 6. The on-vehicle electronic control device according to claim 5, wherein the on-vehicle electronic control device is configured not to erase the deterioration information of the component in the storage unit (5).   The vehicle-mounted electronic control device according to claim 1, wherein the determination unit (12) is configured to be able to designate a part for which a deterioration degree is to be determined based on communication data from the vehicle diagnostic device (9).

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